refactor(django-channels@storage): move throttling methods to redis s…

…torage and close method to base

style: fix linter wrong return type of save_snapshot

pycrdt_websocket/django_channels/storage/base_yroom_storage.py

@@ -1,4 +1,3 @@
-import time
 from abc import ABC, abstractmethod
 from typing import Optional
 
@@ -55,10 +54,8 @@ async def save_snapshot(self):
     ```
     """
 
-    def __init__(self, room_name: str, save_throttle_interval: int | None) -> None:
+    def __init__(self, room_name: str) -> None:
         self.room_name = room_name
-        self.save_throttle_interval = save_throttle_interval
-        self.last_saved_at = time.time()
 
     @abstractmethod
     async def get_document(self) -> Doc:
@@ -95,15 +92,10 @@ async def save_snapshot(self) -> None:
         """Saves the document encoded as update to the database."""
         ...
 
-    async def throttled_save_snapshot(self) -> None:
-        """Saves the document encoded as update to the database, throttled."""
+    async def close(self) -> None:
+        """Closes the storage connection.
 
-        if (
-            not self.save_throttle_interval
-            or time.time() - self.last_saved_at <= self.save_throttle_interval
-        ):
-            return
-
-        await self.save_snapshot()
-
-        self.last_saved_at = time.time()
+        Useful for cleaning up resources like closing a database
+        connection or saving the document before exiting.
+        """
+        pass

pycrdt_websocket/django_channels/storage/redis_yroom_storage.py

@@ -1,3 +1,4 @@
+import time
 from typing import Optional
 
 import redis.asyncio as redis
@@ -14,7 +15,10 @@ class RedisYRoomStorage(BaseYRoomStorage):
     """
 
     def __init__(self, room_name: str, save_throttle_interval: int | None = None) -> None:
-        super().__init__(room_name, save_throttle_interval)
+        super().__init__(room_name)
+
+        self.save_throttle_interval = save_throttle_interval
+        self.last_saved_at = time.time()
 
         self.redis_key = f"document:{self.room_name}"
         self.redis = self._make_redis()
@@ -64,9 +68,22 @@ async def update_document(self, update: bytes):
     async def load_snapshot(self) -> Optional[bytes]:
         return None
 
-    async def save_snapshot(self) -> Optional[bytes]:
+    async def save_snapshot(self) -> None:
         return None
 
+    async def throttled_save_snapshot(self) -> None:
+        """Saves the document encoded as update to the database, throttled."""
+
+        if (
+            not self.save_throttle_interval
+            or time.time() - self.last_saved_at <= self.save_throttle_interval
+        ):
+            return
+
+        await self.save_snapshot()
+
+        self.last_saved_at = time.time()
+
     async def close(self):
         await self.save_snapshot()
         await self.redis.close()